Listen and read. Which is the best title for the article?
Label these statements F (fact) or G (guess), according to the text.
Complete the rules with the highlighted words from the text.
Choose the correct alternative.
Rewrite the sentences using the modal verbs in bold.
Speculate about what the images are, using modal verbs.
Match the sentences from the text in the box below to the correct meaning (A-C).
Complete the sentences using must have, might (not) have or can't have and the verbs below.
Rewrite the sentences using must have, may have or can't have + past participle.